SSI Final Exam questions with correct answers

The event that led to the use of the acronym SCUBA to describe diving was: A. Post-WWII equipment refinements B. The invention of the diving helmet in circa 1800 C. The development of the demand regulator in 1943 D. The development of air pumps in the 19th century correct answer C. The development of the demand regulator in 1943 Absolute pressure is defined as: A. The pressure at the surface plus 1 ata B. The weight of the water that surrounds the diver C. The total pressure exerted on an object D. All answers are correct correct answer C. The total pressure exerted on an object Gauge pressure is defined as: A. The depth reading on a gauge B. The pressure at the surface C. Hydrostatic pressure minus 1 ata D. Absolute pressure minus 1 ata correct answer D. Absolute pressure minus 1 ata One atmosphere of pressure is defined as: A. 1 ata B. Each 33 feet of depth in sea water